<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item in hotCities" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" 
                v-for="(item,key) in cities" 
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
                    <div class="item border-bottom">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
    name:'CityList',
    props:{
        hotCities:Array,
        cities:Object,
        letter:String
    },
    computed:{
        ...mapState({currentCity : 'city'})
    },
    mounted(){
        this.scroll = new Bscroll(this.$refs.wrapper,{click:true})
    },
    watch:{
        letter(){
            if(this.letter){
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl';
    .border-topbottom
        &:before
            border-color: #ccc
        &:after
            border-color:#ccc
    .border-bottom
        &:before
            border-color: #ccc
    .list
        overflow: hidden
        position:absolute
        top 1.58rem
        left:0
        right:0
        bottom:0
        .title
            line-height: .74rem
            background: #eee
            color:#666
            padding-left: .2rem
            font-size: .26rem
        .button-list
            overflow: hidden
            padding 0.1rem .6rem .1rem .1rem
            .button-wrapper
                float: left
                width:33.33%
                .button
                    padding 0.1rem 0
                    margin: 0.1rem
                    text-align: center
                    border: .02rem solid #ccc
                    border-radius: .06rem
        .item-list
            .item
                line-height 0.76rem
                padding-left 0.2rem
                height:.76rem
                color:#666

</style>